Anxiety disorder

Stimulus

Response

Panic disorder

No warning for first one but usually an ongoing stressor; can become conditioned to situational stimuli.

Stark terror. Fear of dying at first, until you learn they are non-fatal and will pass.

Post-traumatic stress disorder

Direct experience of an event that would horrify or lastingly upset most people.

Recurring vivid flashbacks or nightmares about the event.

Obsessive-compulsive disorder

Excessive worry about the perceived noxious stimulus.

Repetitive, time-consuming behavior to remove it.

Body dysmorphic disorder

Perceived defect in body shape.

Eating disorder, usually starvation or binging-purging.

Generalized anxiety disorder

Almost all impending events.

Constant uncontrollable anxiety.

Social anxiety disorder

Any situation in which strangers can see you or hear you.

Arousal of uncontrollable anxiety, resulting in avoidance.

Specific phobia

Particular situation or object, usually feared at first sight.

Intense fear and avoidance.